Galvanized Steel vs Stainless Steel

What is Galvanized Steel and How is it Made?

    The essence of galvanized steel is that ordinary carbon steel is coated with a layer of zinc. The zinc coating can protect the steel underneath from rust, so that the metal products produced will not be corroded when exposed to the atmosphere, and can provide a bright appearance. 

    Galvanizing is an economical and effective anti-rust method that is often used. It is interesting that about half of the world’s zinc production is used in this process.

galvanzied wire 1

    When engaged in the manufacturing industry of construction wire mesh and metal products, you will find that galvanized steel and stainless steel occupy most of the raw materials for product production. They are the two most commonly used metals in production, whether they are used as wires, tubes or Sheet. However, users (purchasers) who are not engaged in the metal industry often face difficulties when they have to choose one of them. Therefore, it is necessary to have a deeper understanding of the differences between various types of steel, which will help you make the most sensible and positive choice for your project.

    Galvanized and stainless steel are two popular options. Although the two types of steel have similar appearances and can prevent rust and corrosion, there are important differences between them. In this article, Dongfu Wire Mesh will help you understand the differences between them and make you more clear about which type of steel you should choose for your project.

What is Stainless Steel and How is it Made?

    Stainless steel is a totally different type of steel alteration, it is mainly composed of iron, chromium and carbon and some other elements (such as molybdenum) made of alloy. Iron is its main component but the added Chromium creates an extra thin Chromium Oxide layer on the surface of the iron. This layer is known as the Passive Layer, which is the signature characteristic of stainless steel. This passive layer prevents any corrosion over the metal surface. And the more Chromium is mixed to the alloy, the more resistance against corrosion and oxidation becomes inevitable.

Stainless Steel Wires

    There are many grades and types of stainless steel, each with different specific chemical composition and resistance to various forms of corrosion and damage. Among them, the most popular are 304 SS steel, 316 SS, and some commonly used grades such as 201, 310, and 430. Different grades indicate and stipulate the content of chromium and other elements required, which helps to indicate the level of corrosion resistance and other characteristics.

    Industrial products made of stainless steel have a smoother surface, brighter appearance, and will not become rough due to wear. And the stainless steel will not stain and has a certain self-cleaning ability.

Corrosion Resistance Comparison

    The corrosion resistance of galvanized steel is weaker than that of stainless steel. Since galvanized steel is only covered with an anti-rust coating, and the coating will gradually wear out over time, and eventually, the steel inside will be exposed to the atmosphere and contact with oxygen, causing rust. The chemical composition of stainless steel itself contains a protective mixture of chromium, even if the surface is worn, it will automatically generate a new chromium oxide passivation layer to continue to resist external corrosion. Therefore, stainless steel is more durable than galvanized steel, which is beyond doubt.

    According to statistics, hot-dip galvanized steel can be used in many environments for decades, while stainless steel is almost permanent.